System of heating



(No Model.)

H. M. CLARK.

SYSTEM 01-" HEATING. No. 549,439. Patented Nov. 5, 1895.

WITNESSES ANDREW ELGRANAM PucTD-umn viAamNGTOrLDC UNITED STATES PATENT ()EEIcE.

HERBERT M. CLARK, OF OSIIKOSII, \VISCONSIN.

SYSTEM OF HEATING.

SPECIFICATION forming part of Letters Patent No. 549,439, dated November 5, 1895.

Application filed January 11, 1895. Serial No. 534,546. (No model.)

T0 at "whom it may concern:

Be it known that I, HERBERT M. CLARK, a citizen of the United States, residing at Oshkosh, in the county of \Vinnebago and State of XVisconsin, have invented certain new and useful Improvements in Systems of Heating; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form a part of this specification.

My invention relates to a system of heating factories and the like where boilers and boiler-furnaces are used.

It is well known that the smoke coming from a boiler-furnace when it passes into the breechin g and base of the smoke-stack is very hot and this heat is ordinarily wasted up the stack.

My invention provides a means of drawing or forcing the hot smoke from the breeching or smoke-door or base of the stack, as the case may be, by forced draft or suction, f0reing or drawing it through coils or fines in a heating-drum and then back into the stack, and also at the same time blowing cold air by a forced blast into the drum against and around the heated flues until it becomes heated and then through conductors or pipes to different parts of the factory, where it is blown into different rooms or portions of the factory for heating purposes.

I am aware that drums provided with fiues through which hot smoke passes by natural draft have heretofore been used; but no forced draft similar to my invention has been used, and the air to be heated has been per mitted to naturally circulate between and among the fiues in a natural direction from all parts of the drum ,without being blown or forced in any manner.

In my invention by means of a blower and an interior arrangement of the parts of the drum I force and compel the cold air to first strike against the smoke-fines nearest to the smoke-outlet and continue along and among the fines, gradually becoming heated, until it is forced out of the drum at a point near'the inlet smoke-pipe, the air being forced in an opposite direction to that of the smoke, so that with equal force to the smoke-current and the air current the air at the outlet of the drum will be approximately of the same temperature as the temperature of the smoke at theinletl In the accompanying drawings, Figure 1 is a vertical section of my apparatus in position upon an ordinary boiler. Fig. 2 is a longitudinal section, and Fig. a cross-section, of my apparatus.

Similar letters and figures refer to similar parts in each view.

The illustration Fig. 2 shows my invention set horizontally upon the boiler and exhausting the smoke from the stack. It can, however, be set in any convenient place contiguous to the boiler, furnace, and stack, and the smoke may be taken either from the stack or from the breeching and the apparatus may be arranged either longitudinally or vertically.

In the drawings, N represents the boiler; P, the grate; O, the breeching, and F the smoke-stack.

A is a cylindrical drum provided with intern al heads at 2 and 3 for supporting a series of fines, as M MM M, &o.

K is a vertical partition extending from the front end of the drum backward as far as shown by the dotted line b, Fig. 1. By means of an exhaust-fan D the hot smoke is drawn from the stack F through a pipe 0 into the chamber B, thence through the fines M M into the chamber II, thence through corresponding fiues M M into the chamber B, and through the pipe E back into the stack. In this manner there is provided a constant current of hot smoke through the chamber 13, the fines M M, the chamber 11, the flues M M, and the chamber 13, thus thoroughly heating the drum. Then by means of the blowing-fan L cold air is forced through the pipe I into the drum around and among the fines M M, back and around the rear end of the partition K, around and among the flues M M until it becomes thoroughly heated, and then out through the pipe J and through intermediate conductors or pipes to diiferent rooms in different parts of the factory. The air is forced in a direction opposite to that of the smoke, and for this purpose either a blowing or an exhausting fan maybe used. Crossplates 5 s .9 may be used, if desired, to stagger the current of air in order to insure its being thoroughly heated.

R is a door, which may be opened to give access to the fines for cleaning purposes, and hand-holes are provided in the front chambers B B, through which the cind ers may be removed.

In addition to the heating of the factory my invention also provides a forced draft for the stack, and also acts as a spark-arrester, as it serves to extinguish any sparks or cinders from the stack.

A damper G is provided within the stack between the inlet-pipe G and the outlet-pipe E, and by it the hot air from the furnace is prevented from ascending into the stack be fore it has been drawn around and through the drum, as hereinbefore described.

I do not wish to confine my invention exclusively to factories, as it may be used in any building and may be used in connection with any common smoke-pipe or chimney.

Therefore what I claim as my invention, and desire to secure by Letters Patent, is

1. In a heating apparatus the combination of a smoke stack, a drum provided with inlet and outlet for air, and inlet and outlet for products of combustion, and having heating flues, a dividing partition separatin the inlet and outlet for the products of combustion, and extending nearly the whole length of the hot air chamber of said drum and thereby causing the air which is to be heated, to pass in a circuitous path from the air inlet to the air outlet, and in its passage come in contact with the exterior of the lines; this combination insuring the entrance of the products of combustion from the stack into said drum on one side of said partition and its coming in contact with the interior of one series of the fines, and the passing off of the same on the opposite side of the partition and in contact with the interior of the other series of the fines, and out into the smoke stack, while the heated air passes off through the air out let, substantially as described.

2. I11 a heating apparatus the combination with a smoke stack, of a drum provided with heating fines, a dividing partition in said drum separating the inlet and outlet for the products of combustion, and extendin g nearly the whole length of the hot air chamber of said drum, a blower adapted to draw the smoke from the stack through one series of said hues and back through the other into the stack, an air inlet and outlet for said drum located respectively 011 opposite sides of said partition, and a blower for forcing the air through said drum, substantially as de scribed.

3. In a heating apparatus the combination with a smoke stack, of a drum provided with heating flues, a dividing partition in said drum, separating the inlet and outlet for products of combustion and extending nearly the whole length of the hot air chamber of the said drum; independent pipes connecting the smoke stack with the drum on the opposite sides of the partition whereby the products of combustion pass forward through one series of fines and back through the other, and a damper in the smoke stack above the inlet pipe and below the outlet pipe of said drum, substantially as described.

4. In a heating apparatus, the combination with a smoke stack, of a drum provided with heating flucs, a dividing partition in said drum separating the inlet and outlet for the products of combustion, and extending nearly the whole length of the hot air chamber of the said drum, independent pipes connecting the smoke stack with. the drum on opposite sides of the partition whereby the products of combustion pass forward through one series of fines and back through the other, a damper in the smoke stack above the inlet pipe and below the outlet pipe of said drum, an air inlet and outlet for said drum located respectively on the opposite sides of said partition, and a blower for forcing the air tl'n'ough said drum, substantially as described.

5. In a heating apparatus, the combination with a smoke stack, of a drum provided with heating flues, a dividing partition in said drum separating the inlet and outlet for the products of combustion, and extending nearly the whole length of the hot air chamber of the said drum, independent pipes connectin the smoke stack with the drum on opposite sides of the partition whereby the products of combustion pass forward through one series of flues and back through the other, a blower for drawing the products of combustion off from one side of said partition, air inlet and outlet pipes located respectively on the opposite sides of said partition, and a blower for forcing the air through said pipes, substantially as described.

(5. In a heating apparatus, the combination with a smoke stack, of a drum provided with heating flues, a dividing partition in said drum separating the inlet and outlet for the products of combustion, and extending nearly the whole length of the hot air chamber of the said drum and cross plates on each side of said partition, means for passing the con tents of the smoke stack forward through one series of said fines and back through the other, and air inlet and outlet passages for said drum, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

HERBERT M. CLARK.

lVitnesses:

CHARLES J. ScHMITr, IV. H. GRAFF. 

